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  DIGITAL Series - SSI / MSI / LSI / VLSI (Basics) Combinational Logic and SSI/MSI: Small Scale Integration and Medium Scale Integration - Glue of circuits. 3 variable Minterm possibilities (x, y, z):                Notation - In the above table, the values are getting multiplied.  The opposite of minterm is maxterm: Minterm - Sum of Minterms. Example: F(x, y, z) = SUMMATION m(6,7)  Maxterm - Product of Sum. Example: F(x, y, z) = (x + y + z) * (/x + y + /z) *** Very Important Note - Karnaugh Maps (or K maps) are used for logical optimization but not included in this article. SSI / MSI Blocks: The present-day large scale integration few years ago, in today's time a small scale integration as shown on the following rough data. SSI  → 10 to 100 MSI  →100 to 1000 LSI  → 1000 to 10,000 VLSI  →10,000+ Transistor Count as per Moore's Law curve - Source: Wikipedia The highest transistor count as per current day (or year 2023) is 3-D stacked 5.3 trillion transistors.  Decoders: Devices